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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 139 · 40 sums
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The method (Know the totals): Acute < 90°, right = 90°, obtuse between 90° and 180°, straight = 180°. On a straight line: the two angles add up to 180°. In a triangle: the three angles add up to 180°. Around a point: 360°. Clock: each hour mark is 30° apart (360° ÷ 12).

NameDateTime takenScore ___ / 40
  1. 1.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  5. 5.An angle measures 50°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  6. 6.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  12. 12.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  14. 14.An angle measures 105°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  15. 15.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 60° and 220°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  19. 19.An angle measures 10°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  20. 20.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 30° and 50°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  23. 23.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  24. 24.An angle measures 125°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  25. 25.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 35° and 35°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  33. 33.Two angles of a triangle are 65° and 85°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 120° and 170°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?

Answer key

  1. 65
  2. 120
  3. 90
  4. 50
  5. Acute
  6. 180
  7. 150
  8. 120
  9. 80
  10. 125
  11. Right
  12. 135
  13. 150
  14. Obtuse
  15. 5
  16. 80
  17. 30
  18. 90
  19. Acute
  20. 120
  21. 100
  22. 190
  23. Obtuse
  24. Obtuse
  25. 65
  26. 80
  27. 70
  28. 110
  29. 140
  30. 45
  31. 75
  32. 30
  33. 30
  34. 25
  35. 30
  36. 70
  37. 60
  38. 75
  39. 60
  40. 20

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